Rolling-mill for making pipes.



No. 667,286. Patented Feb. 5, 1961.

w. r. BARTLETT & E." c.- KENT.

ROLLING HILL FOR MAKING PIPES.

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llsll'n'nxlzs No. 667,286. Patented m. 5,'|9o| W. F. BARTLETT &. E. C. KENT. BOLLENG MILL FOB MAKING PIPES.

7 (Application filed. Nov. 27, 1899.)

(No Model.) 5 Sheets-Shoat 2.

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(Application filed Nov. 27, 1 9

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No. 667,286. Patenfed Feb. 5, l90l.

- W. F. BARTLETT &. E. C. KENT.

ROLLING MILL FOR MAKING PIPES.

(No Model) (Application filed Nov. 27, 1899.) 5 sheets sheat 4- MQMA T W \Q MN w M H fl/www m W wa -W1,

Patented Feb. 5, IBM.

w. F. BARTLETT & E. c. KENT. ROLLING MILL FOR MAKING PIPES.

( Appliation filed Nov. 27, 1899.)

5 Sheets-Shoat 5.

(No Model.)

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UNITED STATES PATENT GFEICE.

WILLIAM F. BARTLETT AND ELLIS G. KENT, OF PHILADELPHIA, PENNSYL- VANIA; SAID KENT ASSIGNOR TO SAID BARTLETT.

ROLLING-MILL FOR MAKING PIPE-S.

SPECIFICATION forming part of Letters Patent No. 667,286, dated. February 5, 1901. Application filed November 27, 1899. Serial No. 738,370. (No model.)

To ctZZ whom 'it may concern: with a plane radiating from the center of the Beitknown that we, WILLIAM F. BARTLETT housing-opening. Swiveled to each head and ELLIS C. KENT, of Philadelphia, in the is the inner end of a screw E, whose outer county of Philadelphia, and in the State of threaded portion passes through the corre- 55 Pennsylvania, haveinvented certain newand spondingly-threaded opening of a pinion F, useful Improvements in Rolling- Mills for confined within a recess ct in the housing, so Making Pipes; and we do hereby declare that as to be restrained from movement in an axial the followingisafull, clear, and exact descripdirection. Located within an annular recess tion thereof, referencebeinghadto theaccoma in the housing A at a point midway be- 60 1o panying drawings, in which tween the pinions F and F of the two sets of Figure 1 is a top plan view of the pipe-mill head-moving mechanisms is a ring G, having embodying our invention; Fig. 2, a view of upon each side gear-teeth that mesh with the the same in side elevation; Fig. 3, an elevateeth of the pinions, so that by the rotation tion of the roll-operating mechanism; Fig. 4, of said ring or annular gear the pinions will 65 a like view of the same with the follower-plate be revolved and the screws E and E and their removed; Fig. 5, a vertical section on the line heads moved simultaneously in directions raxxofFign3; Fig.6,alongitndinal verticalsecdial to the center of the housing-opening. tion through the ingot supporting and turn- The threads of the screws of the two sets of ing rolls, and Fig. 7 a cross-section thereof. heads are respectively right and left, so that 70, Letters of like name and kind refer to like the action of the ring-gear is to cause all of parts in each of the figures. the heads to move in the same direction, as

The object of our invention is to provide a wellas simultaneously. The periphery of the practical mill for rolling pipes or tubes; and ring G is provided with spur-teeth for ento this end said invention consists in the pipegagement by a pinion which is revolved by 75 rolling mill having the construction substanhand or power controlled means to effect the tially as hereinafter specified. rotation of the ring G.

Our invention pertains to pipe-machines in The periphery of each roll B corresponds in which a tube-form ingot is passed between form with the peripheral portion of the pipe concentric series of rolls that operate on both which it is to make, being in the instance 80 the inner and outer surfaces of the ingot, the shown concave, because the pipe to be made outer rolls being moved inwardly from time is cylindrical. to time, resulting in the radial compression One of the journals or shafts of each roll of the Walls of the ingot and its elongation B is extended, and upon it is secured a spuruntil the pipe with the desired thickness of gear H, that meshes with the teeth of a like 85 walls is produced. gear 1 upon a shaft K, which is journaled in In the embodiment of our invention illusbearings L and L upon the outer side of a trated in the drawings we employ a housing follower-plate M, that is removahly fastened A, having a horizontal opening for the pasby bolts to the side of the housing A, a slot sage of the ingot, around and within which m being provided in said plate to permit the 0 40 opening are placed the reducing-rolls. The meshing of the gears. One of the shafts K rollsB and B, which are those that act on the of each set is a continuation of or is. conexterior of the ingot, are arranged in two sets nected with a driving-shaft, and upon it are p of three, the rolls of a set being equidistant two bevel-gears N and N, that respectively and the two sets being relatively so disposed mesh with similar gears O and 0 upon the 5 that the rolls of one set are opposite the spaces respective shafts K and K. The teeth of the between those of the other set. Each roll B spur-gears have such construction that those is journaled on an axis that is at right angles of the gears that intermesh remain in mesh to a plane radial to the center of the housingduring the movements of the rolls B and B opening, being supported in a head 0, that is with their carrying-heads. I00

slidably mounted on a pairof parallel guides It will be perceived that by means of the D and D in the housing A, which lie parallel shafts K and K and their gears each of the -rollsof a set is geared directly to the driving-shaft, so that the objectionable constructhe ingot.

tion is avoided by having to transmit the power to one roll wholly through the other. Also larger and heavier gears are possible with the employment of the shafts K and K and their gears, interposed between the driving-shaft and the rolls, than is the case when the driving-shaft is connected directly to one of the roll-shafts and the latter are geared together. When such a construction as that just mentioned is employed, the parts must be so cramped or crowded :that it is impracticable within the unavoidable limitations to use gears between the shafts of sufficient size and strength to perform their work. Another important advantage resulting from our manner of driving the rolls is that all of the gears are rigidly fixed-or keyed to their respective shafts, it being unnecessary to slidably mount any on account of the adjustment of the rolls. When the demands in rollingmill practice as to strength and rigidity of structure are taken into account, it will be evident that the advantages which accrue from our mode of gearing the rolls are of great moment.

The internal rolls P and P, which operate on the interior of the ingot and are the anvils or supports therefor under the pressure of the outer rolls, are ellipsoidal in form and are arranged in two sets of three, one set being arranged so that the axes of the rolls thereof are in the same vertical plane as the axes of the rolls of one of the outer sets and a roll P of each set being placed with its axis parallel with the axis of a roll B of the outer set. The radius of the periphery of each roll P is the same as that of the interior of the pipe to be constructed, and each roll has such angular length that the three combined form substantially a complete circle.

The rolls P and P are journaled and supportedby a hollow mandrel Q, each roll being situated in an opening formed in the mandrel-wall so as to project outside of said wall. The mandrel Q extends upon but one side of the housing A and is supported at its outer end by a head R.

With our mill no necessity exists for positively driving or rotating the internal rolls, and we have therefore been enabled to discard the rack-and-gear devices heretofore employed for this purpose and make provision of no other means for this object.

On each side of the housing A is 'a series of spool-shaped ingot-carrying rolls S and S, that have their peripheries formed longitudinally upon curved lines which correspond roughly to the curvature of the ingot to be worked. A number of said rolls at suitable intervals are of larger diameter at their ends than the others to furnish ample support laterally for The rolls S and S are journaled in bearings upon parallel horizontal beams T and T, that extend parallel with the axis of themandrel and are mounted upon a supporting mechanism by which they and. the rolls thereon can be bodily raised and lowered. Said mechanism comprises for each pair of beams preferably two rock-shafts U and U, journaled below and crosswise of the beams T and T, each of which shafts has two crankarms u and u, that are respectively connected by rods or bars V and V with a shaft W, mounted in hearings on the under side of the beams. For rocking the shafts T and T each has a crank-arm u, that is connected to an operating-rod X, which is moved longitudinally in one direction by a motor Y and in the opposite direction by a weight Z, that is hung from a crank-arm n on one of the rockshafts. It will be seen that by the mechanism described the entire series of'rolls of both sets may be simultaneously raised or lowered.

For positively drivingthe rolls S and S each has a bevel-pinion 8 upon one of its journals, which meshes with and receives motion from a similar pinion a upon a shaft A, running alongside of and supported in bearings upon the adjacent beam T. Upon the shaft A is a bevel-pinion a meshing with a like pinion 5 upon the upper end of a vertical shaft B, upon whose lower end is splined a bevel-pinion b, that meshes with a similar pinion 0 upon a horizontal shaft 0. The latter by means of bevel-pinions is geared to and receives motion from a drive-shaft D. By reason of the splining of the bevel-pinion 1) upon the'vertical shaft B the latter, with the pinion b, may rise and fall with the like movements of the series of rolls and said rolls be kept in gear with the source of power.

At several points along each series of rolls S and S, preferably at two points, there are devices for turning the ingot around on its axis, which, as shown, comprise two pairs of rollers E and E upon shafts F and F, that are arranged with theiraxes parallel with that of the ingot, the two shafts being on opposite sides of and equidistant from a vertical plane passing through thelongitudinal center of the rolls S and S and the pairs of rollers E and E being in spaces between adjacent rolls S and S. Upon each of the shafts F and F is a spur-gear f, and meshing with the two gears fandf to cause the rollers to revolve in the same direction is a pinion gin gear with a pinion g upon a shaft G. Meshing with a bevel-pinion g on the latter isa bevel-pinion h on a short vertical shaft H, having a second bevel-pinion h, which meshes with a like pinion 2' upon a horizontal shaft 1. The latter by a bevel-pinion 11', which meshes with a bevel-pinion d on the drive-shaft D, receives power from the drive-shaft, a clutch L being provided to enable the two shafts to be connected or'disconnected at will. The rollers E and E have no movement vertically,and when it is desired to place the ingot upon the t11rning=rollers the rolls S and S are lowered sufficiently to place them out of contact with the ingot, leaving the latter to rest wholly upon the turning-rollers.

On each side of the housing A in the space between the latter and the series of rolls S and S is an idler-roll M, journaled in brackets secured to the housing.

It is thought the manner of operating with the mill will be readily seen from the description already given, so that no extended description thereof is required. It is enough to say that after each pass of the ingot between the two series of rolls the outer rolls are adjusted inward to compensate for the decreased diameter of the ingot, that by the carryingrolls on the opposite sides of the housing the ingot is moved longitudinally, such rolls being adjusted vertically, as found necessary, and that when required the ingot is turned on its axis by resting it upon the turningrollers. It is to be understood that though the invention is preferably embodied in an organization having the construction in detail herein shown and described it is not restricted thereto, as changes may be made in construction which will involve no departure in principle.

Having thus described our invention, what we claim is- 1. In a rolling-mill, the combination of a housing, a group of more than two rolls disposed around a common center with their axes intersecting planes radial to such center, shiftable bearings for the respective rolls, shafts equal in number to and respectively geared with the rolls, and bevel-gearing directly connecting one of said shafts with each of the others, substantially as and for the purpose described.

2. In a rolling-mill, the combination of a housing, a mandrel, a series of more than two rolls grouped around said mandrel with their axes intersecting planes radial to the mandrelaxis, shiftable bearings for the respective rolls, shafts equal in number to and respectively geared with the rolls, and bevel-gearing directly connecting one of said shafts with each of the others, substantially as and for the purpose described.

3. In a rolling-mill, the combination of a housing, a mandrel, aseries of more than two rolls mounted in the housing and grouped around said mandrel with their axes intersecting planes radial to the mandrel-axis, shiftable bearings for the respective rolls, shafts on the outside of the housing equal in number to the number of the rolls, spur-gearing between each of said shafts and a roll, and bevel-gearing directly connecting one of the shafts with each of the others, substantially as and for the purpose described.

4:. In a rolling-mill, the combination of a housing, a group of more than two rolls disposed around a common center, with their axes intersecting planes radial to such center, shiftable bearings for the respective rolls,

shafts equal in number to and respectively geared with the rolls, bevel-gearing directly connecting one of said shafts with each of the others, a mandrel around which the rolls are grouped and rolls supported by said mandrel, substantiallyasand for the purpose described.

5. In a rolling-mill, the combination of a housing, a group of more than two rolls disposed around a common center, with their axes intersecting planes radial to such center, shiftable bearings for the respective rolls, shafts equal in number to and respectively geared with the rolls, bevel-gearing directly connecting one of said shafts with each of the others, a mandrel around which the rolls are grouped, and non-driven rolls supported by said mandrel, substantially as and for the purpose described.

6. In a rolling-mill, the combination of a housing, two groups of rolls, each of which groups comprises more than two rolls with their axes at right angles to planes radial to the housing-axis, shiftable bearings for the respective rolls, shafts geared, respectively, to said rolls, and gearing directly between one of said shafts and each of the others of the same group, substantially as described.

7. In a rolling-mill, the combination of reducing-rolls, means for feeding an ingot thereto and an ingot turning roller or rollers adapted to have peripheral contact with the ingot, whose axes extend in the same direction as the direction of longitudinal travel of the ingot, substantially as described.

8. In a rolling-mill, the combination of reducing-rolls grouped about a common center so as to act on several sides of an ingot, means for feeding an ingot to said rolls, and'ingot: turning rollers that engage the ingot on opposite sides of a plane passing longitudinally of the ingot, whereby, by the revolution of the rollers, the ingot will be turned on its axis, substantially as and for the purpose described 9. In a rolling-mill, the combination of reducing-rolls grouped abouta common center so as to act on several sides of an ingot, means for feeding an ingot to said rolls, an ingotturning roller or rollers by which the ingot may be turned about its axis, and means whereby the ingot may be placed in and removed from contact with said roller or rollers, substantially as and for the purpose described.

10. In a rolling-mill, the combination of reducing-rolls grouped about a common center so as to act on several sides of an ingot, means for feeding an ingot to said rolls, ingot-turning rollers that have peripheral contact with the ingot on opposite sides of a plane passing vertically through the ingot-axis and act to turn the ingot about its axis, and means whereby the ingot and rollers may have contact at the will of an operator, substantially as and for the purpose described.

11. In a rolling-mill, the combination of reducing-rolls grouped about a common center I lowering and raising the carrying-rolls relaso as to act) on several sides of an ingot, a setive to the'ingot turning roller or rollers, subries of carrying-rolls, means for raising and I stantially as and for the purpose described.

loweringthelzulbelgandaningot-mirningroller I In testimony that; we claim the foregoing I5 5 or rollers mounted in fixed bearings and exwe have hereunto set our hands this 4th day tending axially in a direction that intersects of November, 1899.

the axes of the carrying-rolls, substantially WM. F. BARTLETT. as and for the purpose described. ELLIS O. KENT.

12. In a rolling-mill, the combination of re- Witnesses: IO ducing-rolls, a series of carrying-rolls, an in- T. B. PROSSER,

got-turning roller or rollers, and means. for F. O. MARSHALL. 

